That first picture you posted of the valve coming off the vibe pump is where you could adjust the pressure. Turning the screw inside the part that points downward towards the reservoir will adjust it/ Counter clockwise (loosen) will reduce the brew pressure, clockwise will increase it. But this valve is intended to be a safety pressure valve, not a pressure adjustment.Another free mod would be to reroute the tube leading from the SPV into an external reservoir to avoid steam and hot water from draining back into the supply reservoir when the SPV fails (which it will...often). Also, try taking the plastic "frothing aid" stuff off the steam wand, and using just the bare pipe to steam milk. With practice, it will get you better results.Temperature control is a challenge with the Evolution. My method for temp surfing is wait till the green light comes on, open the steam valve and run the pump till you get 2 to 4 oz out. Shut off the pump, close the steam valve, start the brew immediately after the green light comes back on. Gives you hotter, more consistant brew temps. You want even hotter, wait 3 to 5 seconds after the green light comes on. Cooler, hit the brew 3 to 5 seconds before the green light comes on.

Thank you very much!made a significant change. Now...before postig on this site I took many shots and observed that through the spv valve was always a constat stream of water(not few drops or air)when warming up and rise a bit when brewing=>important pressure drop,so that is not self primig and I decidet to obstruct it. After the opv change and temp surfing I was able to pull a balanced coffee taste,eliminated that bitter-sour taste,great consitent foam,it's almoust sweet now...the fact is that now it's leaking (in the water tank)around that screw I released,since the change of taste happened,should I be concernedabout the leak?-maybe in the future i'll buy a manometer and make an objectiv adjustment Last I want to ask you about your grinder,it's at half the price of a peugeot brothers or zassenhaus mills...for espresso grind of course-how long until you grind 15 gr,do the burrs last in time,is the grind uniform?

If you're opening the top of the machine then you shouldn't need to go near the group screws. There is a plastic tab in the center of the top that can be popped off with a screwdriver. After doing so you have access to the screw that keeps the top on. Don't forget to turn the steamer control fully on so that you have some leeway to take the top off.

Yes, you need to unlatch the four tabs at the bottom of the front panel, then the top and front panel will lift off.If you're thinking of working with the steam knob, you must remove the four allen bolts that hold the group onto the chassis, there is no other way.try a few drops of penetrating oil on the bolt holes, thenuUse a hex socket and breaker bar to free up the allen bolts.

amufe Said:

do i need to unlatch the four plastic tabs that hold the front panel down?and i cant push the steam valve handle into the machine

The brass nut at the end should be just inside the case, and probably accessible from the top with top off. It can be held with a long wrench and does not take much. There is an o-ring that is the actual seal, not an overly tight nut. I have a Classic, but still used a long wrench to stabilize the inside brass nut and then easily removed the wand nut on the outside.

I have not actually had seen your machine inside, only the parts diagram, so could be wrong.

Once you get the four hex screws off, push up on the group and in on the steam knob and the whole thing will push into the case, giving you room to remove the top.He is correct, you have to access the steam wand nut from the top. Use two wrenches, one to hold the fitting, one to turn the nut, or you'll twist off the brass pipe.

You won't need thread locker when you put the hex screws back in, just get them tight and you'll be fine.

Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post

Forum Rules:No profanity, illegal acts or personal attacks will be tolerated in these discussion boards.No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum.No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek.No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum.Who Can Read The Forum? Anyone can read posts in these discussion boards.Who Can Post New Topics? Any registered CoffeeGeek member can post new topics.Who Can Post Replies? Any registered CoffeeGeek member can post replies.Can Photos be posted? Anyone can post photos in their new topics or replies.Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts.Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.